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FROMLIST: scsi: scsi_debug: Support injecting unaligned write errors

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Allow user space software, e.g. a blktests test, to inject unaligned
write errors.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Douglas Gilbert <dgilbert@interlog.com>
Change-Id: I05beba49f97d897b46bb1dc030037d4ae461f02b
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Bug: 234829282
Link: https://lore.kernel.org/linux-block/20230804154821.3232094-1-bvanassche@acm.org/T/#m90e1577803b1b226a8d85c9ac6195b4c0a4d2e3f
Signed-off-by: Bart Van Assche <bvanassche@google.com>
This commit is contained in:
Bart Van Assche
2023-07-27 14:46:49 -07:00
committed by Bart Van Assche
parent 6c0276ef82
commit 1c33b80bf7
1 changed files with 11 additions and 1 deletions
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12
drivers/scsi/scsi_debug.c
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@@ -181,6 +181,7 @@ static const char *sdebug_version_date = "20200710";
#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
#define SDEBUG_OPT_HOST_BUSY 0x8000
#define SDEBUG_OPT_CMD_ABORT 0x10000
#define SDEBUG_OPT_UNALIGNED_WRITE 0x20000
#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
SDEBUG_OPT_RESET_NOISE)
#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
@@ -188,7 +189,8 @@ static const char *sdebug_version_date = "20200710";
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
SDEBUG_OPT_SHORT_TRANSFER | \
SDEBUG_OPT_HOST_BUSY | \
SDEBUG_OPT_CMD_ABORT)
SDEBUG_OPT_CMD_ABORT | \
SDEBUG_OPT_UNALIGNED_WRITE)
#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
@@ -3495,6 +3497,14 @@ static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
rwlock_t *macc_lckp = &sip->macc_lck;
u8 *cmd = scp->cmnd;
if (unlikely(sdebug_opts & SDEBUG_OPT_UNALIGNED_WRITE &&
atomic_read(&sdeb_inject_pending))) {
atomic_set(&sdeb_inject_pending, 0);
mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
UNALIGNED_WRITE_ASCQ);
return check_condition_result;
}
switch (cmd[0]) {
case WRITE_16:
ei_lba = 0;